29 celebrity reactions to the biggest Oscar mistake in history

• "Moonlight" won best picture at the Oscars after Faye Dunaway already announced "La La Land" won.• When "Moonlight" was announced as the real winner, the audience was shocked.• Celebrities reacted both in the Dolby theater and on Twitter.

Sunday night's shocking mix-up in announcing the winner of 2017's best picture Academy Award is the biggest mistake in Oscar history. Faye Dunaway, along with Warren Beatty, announced that "La La Land" won best picture. In reality, "Moonlight" won, as "La La Land" producer Jordan Horowitz announced in the middle of his would-be Oscar-winning speech.

The reactions were tremendous. Here are 29 celebrity reactions in the Dolby Theatre during the ceremony, and on Twitter.

1. When the real winner was announced, the entire audience stood up to applaud.

ABC

2. Barry Jenkins, who directed "Moonlight," was visibly shocked. He respected how Horowitz handled the situation.